/*
 * Copyright (c) 2022-2025 Huawei Device Co., Ltd.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

class Base {
    bar() {}
}

class Child extends Base {
    foo() {}
}

type Contravariant<T> = (arg: T) => void;

export let Invbariant: Contravariant<Base> = (arg: Base) => {
    arg.bar();
};

export let InvariantChild: Contravariant<Child> = (arg: Child) => {
    arg.foo();
    arg.bar();
};